Borat, Sacha Baron Cohen's subversive Kazakh journalist whose exploits have inspired the number one film around the world, is facing yet more legal action.

This time the plaintiff is Cindy Streit, the Alabama-based etiquette coach who is filmed patiently introducing her bumbling guest to the rudiments of manners.

Streit attends the notorious dinner party in which Borat insults other guests, returns to the table with a bag appearing to contain human waste, and invites a prostitute to join the party.

Streit is claiming the film's producers Springland Films violated the California Unfair Trade Practices Act when it obtained her consent to take part "through fraud and misrepresentation".

According to the teacher's high-powered attorney Gloria Allred, the producers told participants the footage was for a documentary that would only air on Belarus television. The film's wide release beyond Belarusian borders, Allred claims, caused her client to be subjected to ridicule and humiliation.

Twentieth Century Fox, which has already reaped more than £62m ($118m) in worldwide ticket sales, dismissed the allegations.

In a statement the studio said: "Ms Allred's contentions on behalf of her client are nonsense. [Her client] signed written agreements with the production, which clearly stated that a movie was being filmed, and that the movie could be distributed worldwide. Her fee was negotiated and paid. More than three weeks after filming completed, she asked for and received additional payment for the etiquette training services, which she provided on film. And she signed an additional release."

Borat's legal adversaries already include two University of South Carolina students, while Romanian villagers and a lone Turk are separately threatening action.